Optimal Content Caching in Content-Centric Networks

Table 1

Notations and their meanings.

Parameters	Meaning
	Set of routers in the network
	Set of content items
	Set of content items in a node N
	Request rate of at
	Available cache size of node
	Size of the content
	Original source for
	Distance between request and source node in number of hop count
	Number of nodes the request traversed from requestor to source
	Number of hops, the content traversed during content delivery
	Time consumed by node to download content f from node
Decision Variables
	Takes value if node caches copy of content and otherwise
	Takes value if node downloads a copy of content from , and otherwise